module.exports = {
  // fmt: yyyy-MM-dd hh:mm:ss.S
  formatDate: (date, fmt) => {
    if (/(y+)/.test(fmt)) {
      fmt = fmt.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
    }
    let o = {
      "M+": date.getMonth() + 1,
      "d+": date.getDate(),
      "h+": date.getHours(),
      "m+": date.getMinutes(),
      "s+": date.getSeconds(),
      S: date.getMilliseconds()
    };
    for (let k in o) {
      if (new RegExp(`(${k})`).test(fmt)) {
        let str = o[k] + "";
        fmt = fmt.replace(RegExp.$1, RegExp.$1.length === 1 ? str : ("00" + str).substr(str.length));
      }
    }
    return fmt;
  }
};
